Oven gas cock



Oct. 16, 1934.

J.- H. GRAYsoN `Er AL OVEN GAS cock Filed Nov. 20,**1955 2 sheets-sheet 1 Oct. 16, 1934. J.-H. GRAYSQN Er Al.

OVEN GAS COCK Filed NOV. 20. 1935 2 Sheets-Sheet 2 Qms/Q' Patented Oct. 16, 1934 PATE-.Nr OFFICE UNITED STATES l 1,917,552 OVEN GAS COCK John H. Grayson Vand Wayne E- Jenkins, Lynood, Calif., assignors to Grayson Appliance Co. Ltd., Lynwood, Calif., a. corporation oi' California j Application November zo, 1933, serial No, 698,855

.31 Claims. (oi. 236-) This invention relates to a gas cock'or valve specially designed and adapted for usein con-v 215 plicated and, furthermore, were impractical from the standpoint that the parts requiringcleaning, inspection, or repair,y werel not readily' In such combination controls,v it has been difilcult to provide properly for regulation pf the p oven burnerl for broiling; when the dial 'was turned simultaneously with the gas cock to 550 or 600 F. for broiling, the broiling flame could not be turned low manually, and to turn back the gas cock to a lower flame would naturally mean a corresponding low temperature ,30' setting of the oven regulator with the result that theoven burner would be extinguished. It is, therefore, the principal object of our invention to provide a. gas cock, more specically a disc type valve or cock so constructed and with its "gas delivery channels so arranged that it may be turned clockwise from .off from the lowest to the highest indicated temperature, whichis the broiling point, and then turned clockwise still farther to manually shut down the burner @independently of thermostatic action' if it is desired to iinishbroiling with a low flame.

Another object is to provide a gas cock, as just described, in which at the highest indicated temperature (600) the gas delivery channels are properly related and proportioned to allow enough gas to flow to maintain that high temperature.

Still another object is to provide a gas cock of the kind described in which the rotor is releasably locked in oi position and there is required an outward pull on the knob or dial to turn to a selected temperature, the cock including spring means normally holding the vrotor under constant pressure onto an accurately fmished iiat face on thestator to prevent leakage,

and another spring means normally urging the stem in one direction toward locked position so that, when the oil position is reached, the rotor is automatically locked by means of the stem, and so that a predetermined frlctional drag is imposed upon the turning of the stem otherwise to prevent accidental turning of the stem from a selected temperature setting. p

The invention is illustrated in the accompanylng drawings, 'in'which- .Figure l is a longitudinal section through a gas cock made in accordance with our invention; Fig. 1a is a detail view showing-the lock for the stem of the gas cock;` Figs 2 and 3 are plan and rear views, respectively; l

Fig. 4 is a view o thefiat channeled face of the rotor; v

Fig. 5 is a viewof the cooperating iiat channeled face of the stator;

Figs 6 to 9 are views similar to Fig. 5 but showing: in dotted lines the relationship of the channels in' the rotor to the channels and ports in the stator in different positions to which the rotor is moved;

Fig. l0 is plan view of a gas range illustrating the cock interconnected with the oven thermostat for a combination oven control, and

Fig. 1'1 is a vertical section through the oven thermostat taken on the line 11-11 of Fig. 10.

The same reference numerals are applied to corresponding parts throughout. the views.

Referring first to Figs. l to 3, 10 designates Ithe gas supply manifold extending from front to rear ofthe cooking top burner compartment and connected at its 'front end through a union 11 with the gas cock or valve of our invention, indicated generally by the numeral 12. This cock is of the disc type, comprising a stationaryy lports 17 and 18 have passagesr 17 and 18 communicating therewith to deliver gas through pipes 17a and 18a to an oven burner 47 and pilot burner 48, respectively. The passage 19 in the stator communicates with the inlet port 19 to deliver gas to said port from the manifold 10. The pipe connection 17a to the oven burner from passage 17' includes an oven heat regulator or thermostat 49, as disclosed in the copending application of John H. Grayson Serial No. 700,513 illed December 1, 1933, whereby to regulate the delivery of gas to the burner thermostatically to maintain with a selectedv oven temperature. Oven temperatures are selected in the turning or the rotor 14 by means of stem 20 and knob 21 through the proper angularity from the off position, selected oven temperatures being indicated on a dial 22 by a pointer 23 mounted on any convenient stationary support, as, for example, directly on the stator 13, as at 24. The oven heat regulator or oven thermostat 49, as we shall refer to it hereinafter, is set coincidentally with theturning of the rotor 14 through a connecting rod 25 detachably and flexibly joined to the inner end of the stem 20, as at 26. The aforesaid Grayson application contains a full disclosure of the operating connection between the other end of the rod 25 and the oven thermostat. It is clear from this much description that the gas cock of our invention is .intended for use as part ci a combination control in which the turning of a single knob 21 and/or dial 22 results both in the turning on of the gas to the oven burner and its pilot burner at the cock 12 and the setting of the oven thermostat through rod 25 for a selected oven temperature.

Fig. 10 showsthe oven thermostat 49 as having the pipe 17a extended thereto from the cock 12 for delivery of gas to the thermostat, and another pipe is shown extending from the thermostat to the oven burner 47 for delivery of gas to the burner as regulated by the thermostat. The pipe connection 18a from the cock 12 to the pilot burner 48 also clearly appears in this view, and the same is true of the rod connection 25 between the cock 12 and the control cam 51 of the thermostat 49. Turning the cam 51 results in setting the thermostat 49 for different oven temperatures as described in the Grayson application. The thermostat is shown in cross-section in Fig. 11. It comprises a cast body 52 onto which a cap 53 is fastened. The latter supports a ihermostat 54 of the rod and tube type. A member 55 movable with the end of the rod element of the thermostat has a `pointed end bearing in a recess formed in the middle of the fulcrum lever 56 housed in the gas-tight chamber 57 in cap 53. One end of the lever engages the stem 58 of the valve 59 controlling communication between inlet and outlet chambers 60 and 61 provided in the body 52. The pipe 17a previously referred to communicates with inlet chamber 60 and the pipe 50 with chamber (il.` Consequently, as the valve gradually opens or closes with cooling or heating up oi.' the oven, the oven burner flame gets larger or smaller. The oven temperature maintained depends upon the position of fulcrum 62 for the other end of the lever 56. The fulcrum isadjusted by the turning of the cam 51, the cam having a push rod 63 working in suitable guides for communicating movement from the cam to the plunger providing the fulcrum 62. A spring 64 normally urges the fulcrum plunger 62 and push rod 63 in one direction toward the cam so that the position of the fulcrum changes as-the cam is turned, in accordance with the contour of the cam, and, of course, it is understood that the cam is plotted in proper relation to the temperature scale on the dial 22 previously menticned, so that different oven temperatures can be selected by merely turning the dial 22 and the cam 59 with it todifferent positions with respect to the pointer 23.

The cock 12, as clearly appears in Figure 1, has the rotor 14 centered with respect to the stator 13 on a sleeve 27 suitably secured in the center of the stator as wilh a press llt, and projecting forwardly therefrom, as shown. The rotor is centrally counterbored, as at 28, to accommodate a coiled compression spring 29 held under compression by a nut 30 threaded on the front end of the sleeve 27 and serving to hold the rotor 14 wiih its at face 16 pressed against the at face 15 of the stator 13vunder sumcient pressure to keep the cock gas tight. 'I'he sleeve 27 also provides an external bearing on which the rotor turns, and an internal bearing for the stem 20, and not only keeps ihe rotor 14`centered with respect to the stator 13 but prevents parting or separation on the faces 15 and 16 if pressure is exerted on the stem 20 downwardly, upwardly or sideways, through the instrumentality of the knob 21. It will also presently appear \how we 'have utilized the sleeve 27 as part of a locking means for holding the rotor 14 'against turning. The latter stem 20 extends through the sleeve and projec's from the back of the stator sumciently to provide connection with the rod 25, and, where it projects, a coiledcompression spring 31 is ,provided acting btweenv the sleeve 27 and the sleeve part of the flexible connection 26 to urge the stem rearwardly. However, a pin 32 has its one end projecting radially from the stem adjacent the front end of the sleeve 27, and the projecting end enters a notch 33 formed in the end oi the sleeve, as

disclosed in Fig. 1a, whereby to prevent rear` ward movement of the stem and also hold the stem against turning until and unless the stem is moved outwardly by means of knob 21 and/or dial 22 to disengage the end of the pin 32 from the notch 33, when, of course, the stem can be turned. The turning of the stem is limited to nearly 360 by a stop projection 34 formed on the end of the sleeve 27 (Fig. 1a). In olher words, after the stem is pulled out, it can be turned clockwise through almost a' complete revolution until the end of the pin 32 strikes the stop 34. We shall point out presenly how the stem when pulled out and turned clockwise from oil position brings the dial to its highest indicated temperature (600) with respect to pointer 23 in about three-fourihs, or 270. of a complete turn, this being the broiling point, and that the stem can then be turned clockwise still farther to regulate the llame of the oven 'burner independently of vthermostatic action so as to shut it down if it is desired to nish broiling with a lowv name: 'I'he dial 22 may, for that reason, carry additional markings clockwise beyond the 600 mark with reference to size of broiling flame, as high, medium", and ,lo\v.

The word broil" may appear alone, or the Word accidentallyfroxn a set position. The stem 20, in order to permit of its being pulled out in the manner and for the purpose stated, must have a sliding driving connection with the rotor 14, and that is provided through a jaw clutch consisting of a collar 35 suitably fixed on the stem 20 behind the dial 22, and having jaws 36 projecting rearwardly therefrom and slidably rcceived in notches 37 provided in the front end of the rotor 14. The collar ,35 forms a support forthe dial 22, as shown.

Referring' now to Figs. 4 to 9, and to begin with `more particularly, Figs'. 4 .and 5, it will be seen that the inlet port 19 is diametrically opposite the outlet port 17 and on the same radius, and that the secondaryor pilot outlet 18 is midway between ports 17 and- 19 and on the same radius. The stator face `15 has an arcuate channel a'formed therein on the sameradius with the three ports 17-19, and as wide as ports 17 and 19, and reaching both clockwise and counterclockwise from port 17, the channel including approximately 180. The portv 18 has a `much shorter arcuate channel b extending there- -from in a clockwise direction, approximately 30, and rof the same width as the port. Another channel c communicates with port 19 and extends in an arc a short distance, approximately 30, in a counterclockwise direction from said port. The depths of channels a and c are shown in Figure l, channel b being the same depth as channel c, namely, about half the depth of channel a and less than half the width. Rotor 14 has two arcuate channels gi and e formed in its face 16 on the same radius with ports a, b, and vc of stator 13. Channel dis of the same width as channel a and extends for approximately 225. Channel e is of the same width as channels b and c and extends for approximatelyv being midway between the ends of channel d,-as clearly appears in Fig. 4. v

Referring now to Fig. 6, channelsd and cl of rotor 14 are indicated in dotted lines in` the adjacent ends of channels d and e come into communication with port 19, thevchannel e de livering gas to one end of channel a so that gas flows in small amount to the Aoven burner. through port 17'and also to the pilot burner through port 18, additional gas beingdelivered through channel c to channel d and thence to ports 17 and 18. The oven burner and pilot burner are, therefore, supplied with gas and may be ignited either by an automatic oven vlighter or in the old way. Now, i1' the rotor 14 is turned farther in a clockwise direction, it is apparent that channel d comes into greater and greater communication with port 19 and finally full communication, and the continued turning, of course, adjusts the oven thermostat for higher and higher temperatures until the yhighest indicated temperature of 600 is reached, which is the broiling point. Fig. 8 shows the rotor advanced approximately 180, that is a half turn from off position with a full delivery of gas tion between channels d and a. At the end of such movement, the dial indication will be 600, that is the broiling point, and, with this full communication, there is nevertheless suflicient surface contactat 15-16 for an adequate gas seal. Furthermore, there is sufficient communication between ports 17 and 19 at these high temperatures for enough gas to flow to maintain such temperatures, which is not true of some other gas cocks that have come to our attention. In the turning of the rotor still farther in a clockwise direction, it is .apparent that the. end of the channel d,A has less and less communication with port 19, and, consequently, the operator is enabled thereby to shut down the oven burner independently of thermostatic action if he desires to finish broiling with a low flame. Fig. 9 shows the relationship of the channels at the limit point when pin 32 strikes ythe vstop 34 at the broilingfend of therotation of the dialand it will be seen that the pilot burner is stillsupplied with gas by reason of channel erestablishing communication between channels b and c, although the main burner vhas been extinguished. It is apparent, therefore, that manually controlled broiling can be done with the burner shut down to the lowest possible flame, and we avoid the objectionable condition met with in other combination controls where no provision was made for manually controlled broiling, and turning back the gas cock to a, lower flame for such purposes resulted in the burnery being extinguished. Inl other words. we secure with this` invention theequivalent of what was obtained with the old arrangement where the oven thermostat was separately operated independently of the oven `cock, and theoperator, in controlling the broiling flame, would set the oven thermostat for Athe highest temperature and then manipulate the oven cock to regulate the oven burner flame as desired. The improvement of a combination control, making manually controlled broiling possible by manipulation of the same` knob after turning the dial up tol and past the, highest indicated oven temperature, is manifestly of great advantage and eliminates all danger of confusion on they part of the housewife.

`It is bel'eved the foregoing description con.-

veys a good understanding of the objects and advantages of our invention. The appended claims .have been drawn with a view tocovering all legitimate modifications-and adaptations.

vWe claim:

' `l. In a device of the character described, comprising an oven and a man burner therefor having a standby pilot burner, a thermostatically controlled valve for said main burner having amanual setting means for selection of oven temperatures, a manually controlled valve for controlling iiow of fuel from a supply source to said thermostatic valve and to said pilot burner,l and a single manually operable control for simultaneously opening the second valve andl adjust'ng the temperaturevsetting means of the rst'valve for a selected oven temperature, the second valve being so constructed in relation to the iirst valve and the temperature vsetting means of the first valve, whereby' the second valve is arranged to be gradually closed to the oven burner in turning the control mains open to the pilot-burner.

beyond the highest oven-temperature, but-re 2. A stmcture as set forth -inclaim 1 including a single temperature dial with relation to which the single manually operablecontrol is operated for setting theithermostatic 'valve to higher and higher oven Vtemperatures-in.

movement of the control from a startingtposition, the dial including broilingindications betion of oven temperatures, amanually con'-` trolled valve for controlling flow oflfuelffrom a supply source to Ysaid pilot burner kand to said oven burner through said thermostatic valve, said valve being rotatable from one closed l irotor lhaving spring means acting between the position inwhichl it is closed to the pilot burner and oven'burner, through a range ofopen positions to `another closed position lin which it i is closed to the oven burner butv remains open to thefpilot burnenmeans for limiting the turning o! vthe valve to approximately one complete turn, and a single manually rotatable `member for turning said valve and simultaneously turnlng the oven temperature setting means,-said second valvey being so vconstructed relative to the vnrst valve and its setting means whereby the ultimate closing of said second valve'occurs in turning a certain distance beyond the normal range o! oven temperatures in which the lgas now to the oven burner lisgradually diminished to zero-but is continued to the-pilot burner, whereby to permit manually controlledbroiling independent o! thermostatic action.

4. A structure as set forth in claim 3 including an oven temperature dial member'and a cooperating'pointer member, the one member being mounted to turn with the single manually rotatable member to indicate directlyselected oven temperatures, said dial including a range of oven temperatures and, beyond ,the highest normal oven temperature, arangey of broiling indications.

5.A In a combination ovencontrol, a single manuallyrotatable stem, a disc type gas cock comprising a stator, and a rotor 'turning with 'said steun the stator androtor having-gas conducting channels providedV therein for controlling ilow of gas from'an inlet port to a main and a secondary outlet port provided .in vthe stator, the inlet port having communication with' a gas supply and the main outlet with any oven burner and the secondary outlet with a Vpilot burner for the oven'vburner, and a thermostatic oven valve having `a rotatablecontrol member turned by connection with said stem; saidco'ck having its stator and rotor channels sov constructed and arranged relative to the control member, whereby to permit yturning thei rotor to shut down the gas to the oven burner while the thermostatic valve is kept set for ahigh oven temperature.

6. A structure as set forth in claim including a dial bearing oven temperature graduatlons and vmounted to turn with said stern relative to a stationary pointer, the dial having broiler indications beyond the highest oven temperature with successively smaller broiler flame values farther and farther 4from the highest of the oven temperature graduations.

- structure'asset forth in claim!)v including-springmeansfnormally urging the stem endwiseirelative to the cook in one direction, a

stationaryy sleeve relative to which said stem is rotatable andmovable'endwise, a detent pro- Vjection on said: stem received in a recess in 'the end of said sleeve to loc'k the stem releasably in an'rfoil' position, and means providing a slidingdriving connection between theV stem and Ytherotor of the cock.

8. AJ structureas set forth in claim 5 including-spring means normally urging the stem endwiseerelative Ato the cock in "one direction, a stationary vsleeve rrelative `to which said stem is rotatable and movable endwise, a detent pro- AJection lon* said-stem received in a recess inthe end'ofv-said sleevefto` lock the stem releasably yin1.anotl position, and means providing a .sliding driving `connection `between the stem and the rotor ofthe cock, said sleeve passing through saidrotor as a guide therefor, and said sleeveand` rotor to press the rotor into gas tightisealing engagement with the stator.

9. In- -an oven burner control of the type wherein a gas `cock and la thermostatic oven heat regulator are interconnected `for operation by one control for simultaneously opening the #cock and setting the regulator for a desired oven temperature, a ga's cock constructed so as to throttle. down the flow of gas to the oven burner broiling, independently of thermostatic action of rtheregulator.

l11;A1disk'type gas cock comprising a rotor,

and a.v stator having a gas inlet port and a gas outlet `port provided therein in diametrically opposed relation andl a smaller secondary gas voutlet-,port yprovided therein substantially midway between the other ports, all on approximately'y the .same radius with respect to the axis oi' rotation oi' the rotor, the stator having a flat seat Yand the rotor having a ilat face to engage the seat, the rotor having two arcuate channels-provided in its ilat Viface 'on the same radius 'assaid ports, 'the one extending throughout more than '180 and of the same width as said` main ports, and the other being narrower and ofthe same width and on the same radius as the secondary port and disposed substantially midway between the ends of the other channel.

12. Acock as set forth in claim 11, wherein vthe stator has an arcuate channel provided in its seat on the same radius as the main outlet portand of the same width, extending inboth directions from the port through substantially a halt circle.

13. `A cock as set forth in claim 11, wherein the stator` has arcuate channels provided in its seat o! the :same width as the secondary outlet port and on vthe same radius with said port, the one channel'` extending from the secondary outlet port Atoward the inlet port, and the other extending from the inlet port toward the secondary'outlet port, the ends of said channels being spaced a predetermined distance.

14. A cock as set forth in claim 11, wherein the statorhas arcuate channels provided in its seat of thevsame width as the secondary outlet port and on the same radius with said port, the one channel extending from the secondary outlet port toward the .inlet port, and the. other extending from the inlet port toward the secondary outlet port, the ends of said channels being spaced a predetermined distance, and wherein said stator has another channel provided in its seat on the same radius as the main outlet port and of the same width, extending in both directions from the port through substantially a half circle.

15. A cock as set forth in claim 11, wherein the stator has arcuate channels provided in its seat of the same Width as the secondary outlet port and on the same radius with said port, the one channel extending from the secondary outlet port toward the inlet port, and the other extending from the inlet port toward. the secondary outlet port, the ends of said channels being spaced a predetermined distance, so that they may be interconnected by the narrower channel of the rotor, when the same is disposed in register with said stator channels.

' 16. A disk type gas cock comprising a rotor, and a stator having a gas inlet port and a gas outlet port provided therein in diametrically opposed relation and a smaller secondary gas outlet port provided therein substantially midway between the other ports, all on approximately the same radius with respect to the axis of rotation of the rotor, the stator having a flat seat and the rotor having a flat face to engage the seat, the rotor having two arcuate channels provided in its atface on the same radius as said ports, the one extending throughout approximately 225 and of the same width as the main ports, and the other being narrower and of the same Width and on the same radius as the secondary port and disposed midway between the ends of the other channel, extending approximately 17. In a combination oven control, the combination with a source of gas supply, an oven thermostat supplied with gas from said source, an oven burner to which gas is delivered in regulated amounts from the thermostat, and a pilot burner therefor, of a rotary gas cock interposed between the source and the oven thermostat and pilot burner, means interconnecting the rotary part of the gas cock with the thermostat whereby turning of the gas cock results in simultaneous setting of the thermostat, the gas cock having gas passages so constructed and arranged whereby in a single turn of its rotary part from one limit position to another limit position to rst supply gas1 to the pilot burner and oven burner While setting the thermostat for a selected oven temperature, subsequently cut down gas to the oven burner while leaving the oven thermostat at a high temperature setting, and finally supply gas only to the pilot burner at the limit position of the rotary part, and means for turning the rotary part` of said cock.

18. A disk type cock comprising a stator having a iiat seat, a rotor having a flat face ,to engage the seat, the stator and rotor having passages provided therein arranged to have different communication in different positions of the rotor relative tothe stator, a sleeve xed in a central opening provided in the stator and projecting therefrom, normal to the plane of the flat seat, through a registering central hole provided in the rotor whereby tolocate the rotor in centered relation to the stator and serve as a bearing fonthe rotor in the turning thereof relative to the stator, with the flat face of the rotor always fully engaged with the nat seat on the stator, an operating stem rotatably mounted in the sleeve as abearing and loosely connected with therotor to turn the latter, the sleeve supporting the stem independently of the rotor, and spring means normally urging the rotor toward the stator.

19. In a combination oven control for an oven burner and pilot burner, a thermostatic valve having gas passages for delivery of gas to the oven burner in regulated amount and having a rotary temperature adjustment, a rotary gas cock having gas passages communicating with the open burner through the thermostatic valve and also having communication with the pilot burner, and a single manually rotatable control operatively connected with said cock and temperature adjustment to` permit simultaneously opening the cock to the burners and setting the thermostatic valve for a selected oven temperature, said cock having its passages so constructed and arranged whereby, after such opening,

the cock may be turned further toward a broil position to shut down on the oven burner but not on the pilot burner. v

20. In a combination oven control for an oven burner and pilot burner, a thermostatic valve having gas passages for'delivery of gas to the oven burner in regulated amount and having a rotary temperature adjustment, a rotary gas cock having gas passages communicating with the oven burner through the thermostatic valve and also having communication with the pilot burner, and a single manually rotatable control operatively connected with said cock and temperature adjustment to permit simultaneously opening the cock to the burners and setting the thermostatic valve for a selected oven temperature. said cock having its passages so constructed and arranged relative to the control and temperature adjustment, whereby, after such opening of the cock, and beyond the highest temperature setting of the temperature adjustment, the cock may be turned further to throttle the oven burner independently of thermostatic regulation, said cock continuing to supply gas in undiminished amount to the pilot burner. in the throttling of the oven burner.

2l. In an oven burner control, the combination with an oven burner and a pilot burner, of a rotary gas cock having gas passages for delivering gas to the oven burner and pilot burner,

t said passages vbeing so constructed and arranged position, to gradually diminish and finally shutv offv the gas flow to the oven burner but continue the gas flow to the pilot burner.

22. In an oven burner control, the combina-1- tion with an oven burner and a pilot burner, of a vrotary gas cock having gas passages for delivering gas to the oven burner and pilot burner, said passages being so constructed and arranged whereby in a cycle of turning movement of the cock from one limit position to another to rst open the cock to the two burners, and thereafter, starting with a certain flow to the oven burner,` gradually increasing to a peak ow and then gradually decreasing to zero ilow, and, starting with a certain flow to the pilot burner, continuing with substantially the same flow all the Way to the other limit position of the cock.

23. In a gas range, a manifold for supplying gas, a thermostatic device for regulating gas ow to an oven burner, and a single gas valve interconnected with the thermostatic device for simultaneously setting the device for di'erent temperatures in the operation of the valve, said valve being so constructed whereby in one range of operation to supply gas to an oven burner and its pilot burner so that the oven burner alone is under thermostatic control of the thermostatic device, and in another range of operation to supply gas to an oven ,burner and its pilot burner so that the oven burner alone is under throttling control of the valve, independently of the thermostatc device.

24..A disk type cock comprising a stator element having a fiat seat, aA rotor element having a ilat face to engage the seat, the stator and rotor elements having passages provided therein arranged to have different communication in dierent positions of the rotor element relative to the stator element, a sleeve xed in a central opening provided in the one element and projecting therefrom, normal to the plane of the flat seat and face. through a registering central hole provided in the other element whereby to locate 'the elements in centered relation to one another and serve as a bearing for the one element on the other, `an operating stem extending through the sleeve and loosely connected with the rotor to turn the latter, and spring means normally urging the rotor toward the stator.

25. A- disk type cock comprising a stator having a flat seat, 'a rotor having a ilat face to engage the seat, the stator and rotor having passages provided therein arranged to have diiferent communication in different positions of the rotor relative to the stator, a sleeve xed in a central opening provided in the stator and projecting therefrom, normal to the plane of the nat seat, through a registering central hole provided in the rotor wherebyv to locate the rotor in centered relation to the stator and serve as a bearing for the rotor inthe turning thereof relative to the stator, with Ithe flat face of the rotor always fulw engaged with the fiat seat on the stator, an operating stem rotatably mounted in the sleeve as a bearing and loosely connected with the rotor to turn the latter, the sleeve supporting the stem independently of the rotor, an interfitting projection and recess on the stem and sleeve for detachably locking the stem and rotor against turning, said stem being movable `endwise in one direction with respect to the sleeve to disengage the projection and recess to permit turning of the stem and rotor, and spring means normally tending to move the `stem infthe opposite direction.

26. A disk type cock comprising a stator having a flat-seat, a rotor having a flat face to engage the seat, the stator and rotor having passages provided therein arranged to have difrelative to the stator, with the flatface of the, rotor always fully engaged with the flat seat on the stator, van operating stem rotatably mounted in the sleeve as a bearing and loosely connected with the rotor to turn the latter, the sleeve supporting the stem independently of the rotor, an intertting projection and recess on the stem and sleeve for detachably locking the stem and rotor against turning, said stem being movable endwise in one direction with respect to the sleeve to disengage the projection and recess to permit turning of the stem and rotor, and spring means bearing on the sleeve tending normally to move the stem in the opposite direction and urging the rotor toward the stator.

27. A disk type cock comprising a stator having a flat seat, a rotor having a flat face to engage the seat, the stator and rotor having passages provided therein arranged to have dierent communication in different positions of the rotor Arelative to the stator, a sleeve iixed in a central opening provided in the stator and projecting therefrom, normal to the plane of the at seat, through a registering central hole provided in the rotor whereby to locate the rotor in centered relation to the stator and serve as a bearing for the rotor in the turning thereof relative to the stator, with the dat face of the rotor always fully engaged with the flat seat on the stator, spring means surrounding the sleeve and urging the rotor toward the stator, an operating stem rotatably mounted in the sleeve, a handle on the stem slidably connected with the rotor to turn the same, a projection turning with the handle and detachably engaging in a recess provided in the end of the sleeve to lock the rotor against turningthe projection being disengageable from the recess by endwise movement of the handle in one direction relative to the rotor, and spring `means normally tending to move the handle endwise in the opposite direction.

28. A disk type cock comprising a stator having a at seat. a rotor having a dat face to engage the seat, .the stator and rotor having passages provided therein arranged to have different communication in different positions of the rotor relative to the stator, a sleeve fixed in a central opening Yprovided in the stator and projecting therefrom, normal to the plane of the at seat through a registering central hole provided in the rotor whereby to locate the rotor in centered relation to the stator and serve as a bearing for the rotor in the turning thereof` relative to ,the stator, with the flat face of the rotor .always fully engaged with the flat seat on the stator, spring means surrounding the sleeve in front of the rotor and urging the rotor toward the stator, an operating stem rotatably and slidably mounted in the sleeve and extending therethrough, the front end of said stem being connected with the rotor to turn the same, a projection on the stem engageable in a recess provided in the front end of the sleeve to lock the stem and rotor against turning. said projection being disengageable from the recess by forward movement oi' the stem relative to the sleeve, and spring means surrounding the projecting rear end of said stem normally tending to move the stem rearwardly, the projecting rear end of said stem being adapted for connection with another part to be rotated with the stem.

29. A disk type cock as set forth in claim 18 including means on the stem arranged to engage means on thev sleeve to limit rotation of the stem with respect to the sleeve and thus control the turning oi' the rotor relative to the 31. A disk type cock as set forth in claim stator. 2'? including a projection onthe sleeve arranged 30. A disk type cock as set forth Ain claim 25 for engagement by the projection turning with wherein the projection for engagement in the the handle whereby to limit turning ofsaid s recess is provided on the stem, the cockl includhandle and thereby control turning oflthe rotor 80 ing another projection on the end of the sleeve with respect to the stator. for engagement by the projection on the stem to limit turning of s aid stem', whereby to con- JOHN H. GRAYSON. trol the turning of the rotor relative to the WAYNE E. JENmS. 'in stator.

, CERTIFICATE 0F CORRECTION.

Patent No. 1,977,552. i october 16, 1934.

JoHN H. vrGRArsoN, Er AL..

A It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as foilows: Page 5, line 93, claim 19, for the word "open" read oven; and that the saidLetters Patent should be read with this correction therein that the same may conform to thev record of the case in the Patent Office.

Signed and sealed this 8th day of January, A. D. 1935.

Les! ie Frazer (-Seal) I l Acting Commissioner of Patents.A

4s I m C so g Y l 13s zo 14B trol the turning oi' the rotor relative to the 31. A disk type cock as set forth in claim stator. 2'? including a projection onthe sleeve arranged 30. A disk type cock as set forth Ain claim 25 for engagement by the projection turning with wherein the projection for engagement in the the handle whereby to limit turning ofsaid s recess is provided on the stem, the cockl includhandle and thereby control turning oflthe rotor 80 ing another projection on the end of the sleeve with respect to the stator. for engagement by the projection on the stem to limit turning of s aid stem', whereby to con- JOHN H. GRAYSON. trol the turning of the rotor relative to the WAYNE E. JENmS. 'in stator.

, CERTIFICATE 0F CORRECTION.

Patent No. 1,977,552. i october 16, 1934.

JoHN H. vrGRArsoN, Er AL..

A It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as foilows: Page 5, line 93, claim 19, for the word "open" read oven; and that the saidLetters Patent should be read with this correction therein that the same may conform to thev record of the case in the Patent Office.

Signed and sealed this 8th day of January, A. D. 1935.

Les! ie Frazer (-Seal) I l Acting Commissioner of Patents.A

4s I m C so g Y l 13s zo 14B 

